Table 2.
Rates of death in winter and non-winter months, ratio of rates and relative change in winter:non-winter ratios for all causes of death; 1996–2000
| Rate per 1000 person years (No of deaths)* | Winter:non-winter ratio (95% CI)§ | |||
| Winter | Non-winter | |||
| ICD 10 Chapter‡ | ||||
| I | Infection | 5.4 (332) | 3.4 (422) | 1.68 (1.38, 2.05) |
| II | Neoplasms | 214.9 (13184) | 206.7 (25297) | 1.03 (0.98, 1.08) |
| III | Blood etc. | 18.7 (1150) | 14.0 (1719) | 1.26 (1.11, 1.43) |
| IV | Endocrine etc. | 28.3 (7733) | 23.8 (2916) | 1.25 (1.12, 1.39) |
| VI | Mental | 4.4 (271) | 4.9 (602) | 0.91 (0.70, 1.18) |
| VI | Nervous | 16.6 (1017) | 14.0 (1716) | 1.11 (0.96, 1.27) |
| VII | Eye | 0.0 (0) | 0.0 (2) | |
| VIII | Ear | 0.1 (5) | 0.1 (13) | 0.75 (0.21, 2.72) |
| IX | Circulatory | 350.2 (21482) | 287.5 (35189) | 1.20 (1.15, 1.24) |
| X | Respiratory | 97.9 (6005) | 57.4 (7027) | 1.83 (1.71, 1.96) |
| XI | Digestive | 21.5 (1319) | 18.4 (2247) | 1.25 (1.11, 1.40) |
| XII | Skin | 1.9 (114) | 1.5 (184) | 1.29 (0.97, 1.71) |
| XIII | Musculoskeletal | 6.1 (375) | 5.1 (626) | 1.14 (0.94, 1.39) |
| XIV | Genitourinary | 10.9 (667) | 9.5 (1167) | 1.11 (0.96, 1.29) |
| XV | Pregnancy | 0.1 (4) | 0.1 (15) | 0.87 (0.25, 3.03) |
| XVI | Perinatal | 3.6 (223) | 3.6 (436) | 0.95 (0.76, 1.19) |
| XVII | Congenital | 5.4 (333) | 4.9 (605) | 1.15 (0.94, 1.41) |
| XVIII | Symptoms | 4.2 (256) | 3.1 (381) | 1.47 (1.20, 1.81) |
| XIX | Injury | 45.0 (2760) | 47.3 (5789) | 0.93 (0.91, 1.08) |
* No of deaths in winter correspond to a 4 month period; non-winter, an 8 month period
‡ I: Certain infectious and parasitic diseases; II: Neoplasms; III: Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism; III Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism; IV: Endocrine, nutritional and metabolic diseases; V: Mental and Behavioural disorders; VI: Diseases of the nervous system; VII: Diseases of the eye and adnexa; VIII: Diseases of the ear and mastoid process; IX: Diseases of the circulatory system; X: Diseases of the respiratory system; XI: Diseases of the digestive system; XII: Diseases of the skin and subcutaneous tissue; XIII: Diseases of the musculoskeletal system and connective tissue; XIV: Diseases of the genitourinary system; XV: Pregnancy, childbirth and the puerperium; XVI: Certain conditions originating in the perinatal period; XVII: Congenital malformations, deformations and chromosomal abnormalities; XVIII: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified; XIX: Injury, poisoning and certain other consequences of external causes.
§ Generalised negative binomial regression model; overdispersion a linear combination of year